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  1. #1
    Join Date
    Dec 2009
    Posts
    16

    Wiring Stepper Motors to drivers

    Hello - I just bought my stepper/Driver/Power Package specically:

    CNC 4 Axis Package with 425 oz-in motor and KL-4030 Bipolar
    Driver with 36V/9.6A Power Supply

    Can I connect a RJ45 cable from the stepper to the driver?

    Would be nice since there are so much accessories for RJ45
    Thanks
    Eugene

  2. #2
    Join Date
    Aug 2009
    Posts
    392
    Quote Originally Posted by xyzeugene View Post
    Hello - I just bought my stepper/Driver/Power Package specically:

    CNC 4 Axis Package with 425 oz-in motor and KL-4030 Bipolar
    Driver with 36V/9.6A Power Supply

    Can I connect a RJ45 cable from the stepper to the driver?

    Would be nice since there are so much accessories for RJ45
    Thanks
    Eugene
    CAT-X Network cables are only 24awg, which can handle a maximum of 3.5A. You'll need to use something with a larger gauge wire.

  3. #3
    Join Date
    Feb 2005
    Posts
    130
    CAT-X Network cables are only 24awg, which can handle a maximum of 3.5A. You'll need to use something with a larger gauge wire.
    yes, for one wires limit is 3,5A for awg24
    http://www.powerstream.com/Wire_Size.htm

    but, if we connect parallel 2 wires -->> max current rise up to 7A
    we need 4 wires for 2 phase bipolar stepper... but ethernet rj45 cable have 8 wires
    it is good idea to use twisted pair as waveguide for powering phase of stepper (2 phase)

  4. #4
    Join Date
    Oct 2005
    Posts
    2392
    That's single core wire isn't it? You can't bend it more than a handful of times before it snaps.

  5. #5
    Join Date
    Aug 2009
    Posts
    392
    Quote Originally Posted by markcomp77 View Post
    yes, for one wires limit is 3,5A for awg24
    http://www.powerstream.com/Wire_Size.htm

    but, if we connect parallel 2 wires -->> max current rise up to 7A
    we need 4 wires for 2 phase bipolar stepper... but ethernet rj45 cable have 8 wires
    it is good idea to use twisted pair as waveguide for powering phase of stepper (2 phase)
    Ahh, good point. I was under the impression it only had 6 for some ridiculous reason

  6. #6
    Join Date
    Feb 2005
    Posts
    130
    maybe ethernet cable is good to connect motors because of current..
    but, I like use higher diameter shielded cables...

    0.5mm x4 - 4A motors
    1mm (1.5mm) x4 - 8A motors

    and... strong plug is important too

    this is photo of control unit (3 x 7,8A 80V etc)



    black plugs - 10A current possible... shielded cables 4x1mm
    silver socket - easy up to 4A (6A)



    smaller unit



    cables for 4.2A motors (silver plugs)


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